gistfile1.txt

Parent = function(){};
Parent.prototype = {
  parentMethod : function(){ alert('Parent') }
};

Child = function(){}
Child.prototype.__proto__ = Parent.prototype;
Child.prototype.__super = Parent

c = new Child();

c.parentMethod() //alerts parent

This:
Child.prototype.proto = Parent.prototype;

is analagous to:

for(i in Parent.prototype){
Child[i] = Parent[i];
}